and in the tropics, low 30s. to the americas, a snow event, pretty strong snowstorm heading to the west this one will bring significant snowfall, not just to the upper elevations which could see 60 centimeters, but low-lying areas, 10 to 20 centimeters in parts of montana, into idaho, as well as colorado and utah. temperatures will fall by 10 degrees in some places. watch for that rapid cooldown. to the south, a low pressure system and a warm front that is bringing widespread severe weather. very unstable here. anywhere you are seeing the orange, thunderstorms containing damaging winds, large hail and the potential for tornadoes and here in the green, flash flood warning. there is going to be some very heavy rain moving through texas and into arkansas and louisiana. so flash flood risk will be high here, and flash floods, you know how dangerous they are. certainly never try to drive through a flash flood. temperatures are going to be on the rise as well, as those warmer winds come up from the south. 21 degrees in houston, texas.